Maybe everyone could use a gay uncle.

A new study found that homosexual men may be predisposed to
nurture their nieces and nephews as a way of helping to ensure their own genes
get passed down to the next generation.

Research has confirmed that male homosexuality is at least partly
hereditary - it tends to cluster in families, and identical twin brothers
of gay men are more likely to be gay than fraternal twin brothers, who do not
share identical DNA.

But scientists have been puzzled about how these genes are perpetuated,
since homosexual males are less likely to reproduce than straight males.
Basically, why haven't gay people goneextinct?

One idea is called the "kin selection hypothesis."
Perhaps gay men are biologically predisposed to help raise the offspring of
their siblings and other relatives.

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